Hydraulic anti-rotation self-unlocking device and crane transport vehicle using the same

Abstract

The present invention relates to a hydraulic anti-rotation self-unlocking device, which comprises an anti-rotation self-unlocking hydraulic cylinder (1) and a slewing locking surface (2). When the anti-rotation self-unlocking hydraulic cylinder (1) is not subjected to hydraulic pressure, a friction locking block (16) is pressed against the slewing locking surface (2) to play an anti-rotation locking role. When the anti-rotation self-unlocking hydraulic cylinder (1) is subjected to hydraulic pressure, the friction locking block (16) no longer presses against the slewing locking surface (2) to automatically release the locking role. A hydraulic anti-rotation self-unlocking device is provided on a crane (6) of a lifting transport vehicle. The anti-rotation self-unlocking hydraulic cylinder (1) is mounted on a base (61), and the friction locking block (16) cooperates with a slewing rotating surface on a lifting slewing seat (62). It uses hydraulic means to automatically lock and open a mechanical device that rotates in cooperation with each other, and does not require manual insertion and removal of a locking pin to prevent rotation and unlocking between components. It is convenient and safe to use.

Description

Technical Field

[0001] The invention relates to a mechanical device, in particular to a hydraulic anti-rotation self-unlocking device and a lifting and transporting vehicle using the device. Background Art

[0002] Many mechanical equipments have mechanical parts that rotate when in operation and need to be locked together when not in operation. Take a crane as an example. When lifting operations are not required, its lifting assembly needs to be firmly locked on the lifting base to prevent rotation for transportation and safety reasons. At present, the device used to prevent rotation on these equipments is generally a locking pin rod arranged between two rotating matching parts. When rotational matching is required, the locking pin rod is pulled out, and when rotational matching is not required, the locking pin rod is inserted. The insertion and removal of the locking pin rod is generally done manually. If the staff forgets to insert or remove the locking pin rod, it will cause unnecessary trouble. Sometimes, even if the locking pin rod is inserted, the strong force between the mechanical equipment may cause the locking pin rod to break, and absolute safety cannot be guaranteed. It can be seen that this anti-rotation and unlocking operation method of manually pulling out and inserting the locking pin rod is neither convenient nor safe enough. Summary of the invention

[0003] The purpose of the present invention is to provide a hydraulic anti-rotation self-unlocking device which does not require manual insertion and extraction of a locking pin to prevent rotation and unlocking between components and is convenient and safe to use, and a lifting and transporting vehicle using the hydraulic anti-rotation self-unlocking device.

[0004] The technical solution of the present invention is:

[0005] The hydraulic anti-rotation self-unlocking device comprises an anti-rotation self-unlocking hydraulic cylinder and a rotary locking surface respectively arranged on two components that rotate in cooperation with each other. The anti-rotation self-unlocking hydraulic cylinder comprises a cylinder body, a cylinder rod and a piston. The cylinder rod is axially slidingly sealed with a cylinder rod hole on a front end cover of the cylinder body. The piston is slidably mounted in the cylinder body and fixedly mounted on the rear end of the cylinder rod. A friction locking block cooperating with the rotary locking surface is provided at the front end of the cylinder rod outside the cylinder body. A plurality of butterfly springs are arranged in the cylinder body between the piston and the rear end cover of the cylinder body. An oil pipe joint connected to the cylinder hydraulic cavity between the piston and the front end cover of the cylinder body is arranged on the side wall of the cylinder body. The oil pipe joint is connected to the hydraulic system through an oil pipe. When the anti-rotation self-unlocking hydraulic cylinder is not subjected to the action of hydraulic pressure, the cylinder rod is extended forward by the pressure of the butterfly spring, driving the friction locking block to be pressed tightly on the rotary locking surface to play an anti-rotation locking role. When the anti-rotation self-unlocking hydraulic cylinder is subjected to the action of hydraulic pressure, the piston compresses the butterfly spring and drives the cylinder rod to retract, driving the friction locking block to no longer press the rotary locking surface and automatically release the locking effect.

[0006] The crane transport vehicle using the hydraulic anti-rotation self-unlocking device comprises a chassis and a cab, a crane and a carriage which are sequentially installed on the chassis from front to back. The crane comprises a base, a lifting slewing seat, a lifting column, a lifting arm and a luffing cylinder. The base is fixedly installed on the chassis, the lifting slewing seat is rotatably installed on the base, the lower end of the lifting column is fixed on the lifting slewing seat, the rear end of the lifting arm is hinged to the upper end of the lifting column, the tail end of the luffing cylinder body is hinged to the lifting slewing seat, and the end of the cylinder rod is hinged to the lifting arm. The crane is provided with There is the above-mentioned hydraulic anti-rotation self-unlocking device, the anti-rotation self-unlocking hydraulic cylinder of the hydraulic anti-rotation self-unlocking device is installed on the base, the slewing locking surface is the rotating slewing surface of the lifting slewing seat, the friction locking block on the cylinder rod of the anti-rotation self-unlocking hydraulic cylinder cooperates with the rotating slewing surface on the lifting slewing seat, and the anti-rotation self-unlocking hydraulic cylinder is connected to the hydraulic system of the crane through an oil pipe. When not affected by hydraulic pressure, the friction locking block is pressed tightly on the rotating slewing surface to automatically lock and prevent rotation. When affected by hydraulic pressure, the friction locking block no longer presses the rotating slewing surface and automatically releases the lock.

[0007] The technical effect of the present invention is that it uses hydraulic means to automatically lock and open the mechanical devices that rotate with each other, and does not require manual insertion and removal of the locking pin to prevent rotation and unlocking between the components, so it is convenient and safe to use. When the hydraulic system of the crane and transport vehicle is working, the hydraulic pressure causes the device to open automatically, allowing the crane to rotate normally. After the lifting operation is completed, as the hydraulic system of the crane and transport vehicle stops, the hydraulic pressure drops and the device automatically locks to play a locking role, thereby avoiding unnecessary accidents. It overcomes the trouble caused by manual insertion and removal of the locking pin, and can prevent accidents caused by forgetting to insert the locking pin, achieving the purpose of automatic locking and automatic unlocking, and its locking force is greater, making it safer to use. BRIEF DESCRIPTION OF THE DRAWINGS

[0008] Figure 1 This is a three-dimensional cross-sectional structural diagram of a hydraulic anti-rotation self-unlocking device according to an embodiment of the present invention;

[0009] Figure 2 This is a three-dimensional diagram of a hydraulic anti-rotation self-unlocking device according to an embodiment of the present invention;

[0010] Figure 3 It is a three-dimensional diagram of a lifting and transporting vehicle according to an embodiment of the present invention. DETAILED DESCRIPTION

[0011] like Figure 1As shown, the hydraulic anti-rotation self-unlocking device comprises an anti-rotation self-unlocking hydraulic cylinder 1 and a rotary locking surface 2 respectively arranged on two parts that rotate in cooperation with each other. The anti-rotation self-unlocking hydraulic cylinder 1 comprises a cylinder body 11, a cylinder rod 12 and a piston 13. The cylinder rod 12 is axially slidably sealed with a cylinder rod hole 15 on a front end cover 14 of the cylinder body 11. The piston 13 is slidably mounted in the cylinder body 11 and fixedly mounted on the rear end of the cylinder rod 12. A friction locking block 16 that cooperates with the rotary locking surface 2 is provided at the front end of the cylinder rod 12 outside the cylinder body 11. A plurality of friction locking blocks 16 are provided in the cylinder body 11 between the piston 13 and the rear end cover 17 of the cylinder body 11. A butterfly spring 18 is provided between the piston 13 and the front end cover 14 of the cylinder body 11, and an oil pipe joint 20 is provided on the side wall of the cylinder body 11, which is connected to the hydraulic chamber 19 of the cylinder body 11 between the piston 13 and the front end cover 14 of the cylinder body 11. The oil pipe joint 20 is connected to the hydraulic system through an oil pipe. When the anti-rotation self-unlocking hydraulic cylinder 1 is not subjected to the hydraulic pressure, the cylinder rod 12 extends forward under the pressure of the butterfly spring 18, driving the friction locking block 16 to press tightly on the rotary locking surface 2 to play an anti-rotation locking role. When the anti-rotation self-unlocking hydraulic cylinder 1 is subjected to the hydraulic pressure, the piston 13 compresses the butterfly spring 18 and drives the cylinder rod 12 to retract, driving the friction locking block 16 to no longer press tightly on the rotary locking surface 2 to automatically release the locking effect.

[0012] The rotary locking surface 2 is an outwardly convex arc surface (such as Figure 1 As shown), concave arc surface (as shown Figure 2 As shown) or a plane, the friction surface 21 of the friction locking block 16 and the rotary locking surface 2 is a concave arc surface (as shown) Figure 1 As shown), convex arc surface (as shown Figure 2 shown) or flat surface.

[0013] A mounting plate 22 which is integrated with the front end cover 14 is provided on the front end cover 14 of the cylinder body 11 , and a plurality of mounting bolt holes 23 are provided on the mounting plate 22 .

[0014] A pressure adjusting screw 3 is provided on the anti-rotation self-unlocking hydraulic cylinder 1, and the pressure adjusting screw 3 is axially mounted on the rear end cover 17 of the cylinder body 11 through a thread. The front end of the pressure adjusting screw 3 located in the cylinder body 11 is provided with a pressure plate 31 located between the rear end cover 17 of the cylinder body 11 and the butterfly spring 18, and the rear end located outside the cylinder body 11 is provided with a screwing head 32 that cooperates with a wrench.

[0015] A spare cap 33 located outside the cylinder body 11 is threadedly mounted on the pressure regulating screw rod 3 .

[0016] The screwing head 32 at the rear end of the pressure regulating screw rod 3 is in the shape of a hexagonal or square column.

[0017] like Figure 3As shown, a lifting and transporting vehicle using the hydraulic anti-rotation self-unlocking device comprises a chassis 4 and a cab 5, a crane 6 and a carriage 7 which are sequentially mounted on the chassis 4 from front to rear. The crane 6 comprises a base 61, a lifting swivel seat 62, a lifting column 63, a lifting arm 64 and a luffing cylinder 65. The base 61 is fixedly mounted on the chassis 4, the lifting swivel seat 62 is rotatably mounted on the base 61, the lower end of the lifting column 63 is fixed on the lifting swivel seat 62, the rear end of the lifting arm 64 is hinged to the upper end of the lifting column 63, the tail end of the cylinder body of the luffing cylinder 65 is hinged to the lifting swivel seat 62, and the end of the cylinder rod is hinged to the lifting arm 64. 4-phase hinged, the crane 6 is provided with the above-mentioned hydraulic anti-rotation self-unlocking device, the anti-rotation self-unlocking hydraulic cylinder 1 of the hydraulic anti-rotation self-unlocking device is installed on the base 61, the slewing locking surface 2 is the rotating slewing surface of the lifting slewing seat 62, the friction locking block 16 on the cylinder rod 12 of the anti-rotation self-unlocking hydraulic cylinder 1 cooperates with the rotating slewing surface on the lifting slewing seat 62, the anti-rotation self-unlocking hydraulic cylinder 1 is connected to the hydraulic system of the crane 6 through an oil pipe, when not affected by hydraulic pressure, the friction locking block 16 is pressed against the rotating slewing surface and automatically locks the anti-rotation, when affected by hydraulic pressure, the friction locking block 16 no longer presses the rotating slewing surface and automatically releases the lock.

[0018] The anti-rotation self-unlocking hydraulic cylinder 1 is located outside the lifting slewing seat 62 and is installed on the base 61. The friction locking block 16 of the anti-rotation self-unlocking hydraulic cylinder 1 cooperates with the circular outer rotating surface on the lifting slewing seat 62 to play an anti-rotation self-unlocking role.

[0019] The anti-rotation self-unlocking hydraulic cylinder 1 is located on the inner side of the lifting slewing seat 62 and is installed on the base 61. The friction locking block 16 of the anti-rotation self-unlocking hydraulic cylinder 1 cooperates with the circular inner rotating surface on the lifting slewing seat 62 to play an anti-rotation self-unlocking role.

[0020] In the prior art, when the lifting function of the crane transport vehicle is not used, the lifting arm 64 of its lifting assembly is located above the carriage 7 along the direction of the vehicle body, so that the crane transport vehicle can travel normally on the road. For safety, the lifting slewing seat 62 needs to be firmly locked on the base 61 to prevent the front end and the head of the lifting arm 64 from being thrown out of the vehicle body due to inertia when the crane transport vehicle turns quickly. If it sweeps or scrapes the vehicles traveling in the same direction or opposite direction, it will cause unnecessary trouble. In order to prevent such accidents from happening, a locking pin rod is provided between the lifting slewing seat 62 and the base 61 of the existing crane transport vehicle to prevent the lifting slewing seat 62 from rotating on the base 61, and the locking pin rod needs to be manually inserted between the lifting slewing seat 62 and the base 61. Since the locking pin rod is manually pulled out and inserted, if the staff forgets to insert the locking pin rod after the lifting operation. If the crane truck turns too fast, even if the locking pin is inserted, the strong inertia of the crane arm may break the locking pin, which poses a certain safety hazard and cannot guarantee absolute safety. This device is installed on the crane truck and can automatically unlock and prevent rotation as the hydraulic system of the crane starts and stops. It is convenient and safe to use. Similarly, this device can be installed on ordinary cranes or other mechanical devices to solve the same problem and achieve similar effects.

Claims

1. A hydraulic anti-rotation self-unlocking device, comprising an anti-rotation self-unlocking hydraulic cylinder (1) and a rotary locking surface (2) respectively arranged on two components that rotate in cooperation with each other, characterized in that: The anti-rotation self-unlocking hydraulic cylinder (1) comprises a cylinder body (11), a cylinder rod (12) and a piston (13); the cylinder rod (12) and a cylinder rod hole (15) on a front end cover (14) of the cylinder body (11) are axially slidably sealed; the piston (13) is slidably mounted in the cylinder body (11) and fixedly mounted on the rear end of the cylinder rod (12); a friction locking block (16) which matches a rotation locking surface (2) is provided at the front end of the cylinder rod (12) outside the cylinder body (11); a plurality of butterfly springs (18) are provided in the cylinder body (11) between the piston (13) and the rear end cover (17) of the cylinder body (11); an oil pipe joint (20) which is connected to a hydraulic chamber (19) of the cylinder body (11) between the piston (13) and the front end cover (14) of the cylinder body (11) is provided on the side wall of the cylinder body (11); the oil pipe joint (20) is connected to a hydraulic system through an oil pipe; and the anti-rotation self-unlocking hydraulic cylinder (1) comprises a plurality of butterfly springs (18) which are located between the piston (13) and the rear end cover (17) of the cylinder body (11); and a plurality of butterfly springs (18) which are located between the piston (13) and the rear end cover (17) of the cylinder body (11) are provided on the side wall of the cylinder body (11). The oil pipe joint (20) is connected to a hydraulic system through an oil pipe. When the cylinder (1) is not subjected to the action of hydraulic pressure, the cylinder rod (12) extends forward under the pressure of the butterfly spring (18), driving the friction locking block (16) to press against the rotary locking surface (2) to play an anti-rotation locking role. When the anti-rotation self-unlocking hydraulic cylinder (1) is subjected to the action of hydraulic pressure, the piston (13) compresses the butterfly spring (18) and drives the cylinder rod (12) to retract, driving the friction locking block (16) to no longer press against the rotary locking surface (2) to automatically release the locking role. The anti-rotation self-unlocking hydraulic cylinder (1) is provided with a pressure regulating screw (3), which is axially mounted on the rear end cover (17) of the cylinder body (11) through a thread. The front end of the pressure regulating screw (3) located inside the cylinder body (11) is provided with a pressure plate (31) located between the rear end cover (17) of the cylinder body (11) and the butterfly spring (18), and the rear end located outside the cylinder body (11) is provided with a screwing head (32) matched with a wrench.

2. The hydraulic anti-rotation self-unlocking device according to claim 1, characterized in that The rotary locking surface (2) is an outer convex arc surface, an inner concave arc surface or a plane, and the friction surface (21) of the friction locking block (16) matching the rotary locking surface (2) is an inner concave arc surface, an outer convex arc surface or a plane.

3. The hydraulic anti-rotation self-unlocking device according to claim 1, characterized in that The front end cover (14) of the cylinder body (11) is provided with a mounting plate (22) which is integral with the front end cover (14), and the mounting plate (22) is provided with a plurality of mounting bolt holes (23).

4. The hydraulic anti-rotation self-unlocking device according to claim 1, characterized in that The pressure regulating screw rod (3) is threadably mounted with a spare cap (33) located outside the cylinder body (11).

5. The hydraulic anti-rotation self-unlocking device according to claim 1, characterized in that The screwing head (32) at the rear end of the pressure regulating screw (3) is in the shape of a hexagonal or square column.

6. A lifting and transporting vehicle using the hydraulic anti-rotation self-unlocking device of claim 1, comprising a chassis (4) and a cab (5), a crane (6) and a carriage (7) which are sequentially mounted on the chassis (4) from front to rear, the crane (6) comprising a base (61), a lifting slewing seat (62), a lifting column (63), a lifting arm (64) and a luffing cylinder (65), the base (61) being fixedly mounted on the chassis (4), the lifting slewing seat (62) being rotatably mounted on the base (61), the lower end of the lifting column (63) being fixed on the lifting slewing seat (62), the rear end of the lifting arm (64) being hinged to the upper end of the lifting column (63), the tail end of the cylinder body of the luffing cylinder (65) being hinged to the lifting slewing seat (62), and the end of the cylinder rod being hinged to the lifting arm (64), characterized in that: The crane (6) is provided with the hydraulic anti-rotation self-unlocking device as claimed in claim 1, the anti-rotation self-unlocking hydraulic cylinder (1) of the hydraulic anti-rotation self-unlocking device is installed on the base (61), the slewing locking surface (2) is the slewing surface of the lifting slewing seat (62), the friction locking block (16) on the cylinder rod (12) of the anti-rotation self-unlocking hydraulic cylinder (1) cooperates with the slewing surface on the lifting slewing seat (62), the anti-rotation self-unlocking hydraulic cylinder (1) is connected to the hydraulic system of the crane (6) through an oil pipe, when not affected by hydraulic pressure, the friction locking block (16) is pressed against the slewing surface and automatically locks the anti-rotation, when affected by hydraulic pressure, the friction locking block (16) no longer presses against the slewing surface and automatically releases the lock.

7. The lifting and transporting vehicle according to claim 6, characterized in that The anti-rotation self-unlocking hydraulic cylinder (1) is located outside the lifting slewing seat (62) and is installed on the base (61). The friction locking block (16) of the anti-rotation self-unlocking hydraulic cylinder (1) cooperates with the circular outer rotating surface on the lifting slewing seat (62) to play an anti-rotation self-unlocking role.

8. The lifting and transporting vehicle according to claim 6, characterized in that The anti-rotation self-unlocking hydraulic cylinder (1) is located on the inner side of the lifting slewing seat (62) and is installed on the base (61). The friction locking block (16) of the anti-rotation self-unlocking hydraulic cylinder (1) cooperates with the circular inner rotating surface on the lifting slewing seat (62) to play an anti-rotation self-unlocking role.

Images